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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureInterior ConstructionNänikonFenster Service Zürichsee GmbH
Fenster Service Zürichsee GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Fenster Service Zürichsee GmbH is the repair and maintenance of windows, as well as the installation of burglar-resistant solutions such as anti-theft bars, mushroom head locks and special glasses. The company also offers the replacement of damaged insulating glass and works independently of manufacturers.

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Products & services

Industry:Interior Construction
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4.2/5

Fenster Service Zürichsee GmbH

11
Window service
Repair of defective windows independent of the manufacturer, including oiling and greasing; short-term assignments for private customers, businesses and property management companies.
Glass break repair and insulating glass replacement
Replacement of damaged insulating glass units of all brands, including disposal of the existing glass; also as part of service and repair assignments.
Replace, renew and add window fittings
Replacement of defective window fittings on all window systems, including lift-and-slide doors; if desired, also addition or renewal.
Burglary protection for windows
Measures to increase burglary resistance, remove traces of forced entry and repair common window systems.
Retrofit mushroom-head locking
Retrofit existing windows with mushroom-head locking mechanisms, including handle with key.
Install Quadragard
Installation of Quadragard burglary protection on windows, including handle with key.
Replace window seals
Replacement of existing or defective window seals.
Deliver and install insect screens
Supply and installation of suitable insect and mosquito screens, also as roller blinds or sliding pleated screens.
Weather protection for windows
Subsequent protection for existing windows against external weather effects with metal.
Install cat flaps
Installation of cat flaps in glass or wood, including delivery of a cat flap according to your choice.
Complete window replacement
Complete replacement of severely damaged windows with windows from Swiss-made suppliers.
Trust & reputation

ranQ Trust Score of Fenster Service Zürichsee GmbH: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Fenster Service Zürichsee GmbH scores 79.7 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.68.824%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.89.710%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.100.08%
Fenster Service Zürichsee GmbH scores 75.7 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.83.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
Fenster Service Zürichsee GmbH scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
Fenster Service Zürichsee GmbH scores 22.9 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.22.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Fenster Service Zürichsee GmbH reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.4 out of 5 stars from 33 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.4
of 5

Aggregated from 33 reviews across all connected sources

Sources
GGoogle4.433
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Tumigerstrasse 120
8606 Nänikon
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-411.230.865
Founded
2017 · 9 years
Last commercial register change
March 29, 2023
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
88.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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